linux-kernel - Re: [PATCH 3/5] riscv: smp: Support for 64bit hartid

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Message-ID: <fff02688-e272-3462-d950-427ebe4ad862@canonical.com>
Date:   Wed, 25 May 2022 17:58:58 +0200
From:   Heinrich Schuchardt <heinrich.schuchardt@...onical.com>
To:     Sunil V L <sunilvl@...tanamicro.com>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-efi@...r.kernel.org, Sunil V L <sunil.vl@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Atish Patra <atishp@...osinc.com>,
        Anup Patel <apatel@...tanamicro.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Albert Ou <aou@...s.berkeley.edu>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Marc Zyngier <maz@...nel.org>
Subject: Re: [PATCH 3/5] riscv: smp: Support for 64bit hartid

On 5/25/22 17:11, Sunil V L wrote:
> The hartid can be a 64bit value on RV64 platforms. This patch
> modifies the hartid parameter in riscv_hartid_to_cpuid() as
> unsigned long so that it can hold 64bit value on RV64 platforms.
> 
> Signed-off-by: Sunil V L <sunilvl@...tanamicro.com>

Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@...onical.com>

> ---
>   arch/riscv/include/asm/smp.h | 4 ++--
>   arch/riscv/kernel/smp.c      | 4 ++--
>   2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h
> index 23170c933d73..d3443be7eedc 100644
> --- a/arch/riscv/include/asm/smp.h
> +++ b/arch/riscv/include/asm/smp.h
> @@ -42,7 +42,7 @@ void arch_send_call_function_ipi_mask(struct cpumask *mask);
>   /* Hook for the generic smp_call_function_single() routine. */
>   void arch_send_call_function_single_ipi(int cpu);
>   
> -int riscv_hartid_to_cpuid(int hartid);
> +int riscv_hartid_to_cpuid(unsigned long hartid);
>   
>   /* Set custom IPI operations */
>   void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops);
> @@ -70,7 +70,7 @@ static inline void show_ipi_stats(struct seq_file *p, int prec)
>   {
>   }
>   
> -static inline int riscv_hartid_to_cpuid(int hartid)
> +static inline int riscv_hartid_to_cpuid(unsigned long hartid)
>   {
>   	if (hartid == boot_cpu_hartid)
>   		return 0;
> diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
> index b5d30ea92292..018e7dc45df6 100644
> --- a/arch/riscv/kernel/smp.c
> +++ b/arch/riscv/kernel/smp.c
> @@ -47,7 +47,7 @@ static struct {
>   	unsigned long bits ____cacheline_aligned;
>   } ipi_data[NR_CPUS] __cacheline_aligned;
>   
> -int riscv_hartid_to_cpuid(int hartid)
> +int riscv_hartid_to_cpuid(unsigned long hartid)
>   {
>   	int i;
>   
> @@ -55,7 +55,7 @@ int riscv_hartid_to_cpuid(int hartid)
>   		if (cpuid_to_hartid_map(i) == hartid)
>   			return i;
>   
> -	pr_err("Couldn't find cpu id for hartid [%d]\n", hartid);
> +	pr_err("Couldn't find cpu id for hartid [%lu]\n", hartid);
>   	return -ENOENT;
>   }
>